Thomas buekhaed



Patented May 12, 1885.

Infiewiar:

N. PETERS, Phatn-Lflhngnpher. Walhingium DFC.

UNITED STATES.

ATENT rrrcu.

THOMAS BURKHARD, OF BROOKLYN, NE\V YORK.

BOTTOM FOR CANS, etc.

SPECIFICATION forming part-of Letters Patent No. 317,620, dated May 12, 1885.

(No model.)

To all whom it may concern:

Be it known that I, THOMAS BURKHARD, of Brooklyn, in the county of Kings and State of New York, have invented a new and useful Improvement in Bottoms for Stoves, Cans, and other Oylindric Vessels, of which the following is a specification.

Stoves which are employed by confectioners are usually composed largely of sheet metal, and are subjected to very rough usage. Their bottoms have usually been made of sheet metal, and have been strengthened in various ways by skeleton frames of cast-iron, so as to prevent them from bulging downward and cracking when highly heated by the fire being dumped into the ash-pit and then cooled by reason of water thrown in to quench the fire.

My invention is applicable to the bottoms of such stoves, and is also particularly applicable for the bottoms of ash-cans, milk-cans, and other cylindric vessels which are subjected to rough usage, and in which it is difficult to obtain a firm and secure connection of the bottom with the body of the can or vessel, and to avoid bruising and breaking of such bottom.

The invention consists in novel combinations of parts hereinafter described, and pointed out in the claims.

In the accompanying drawings, Figure 1 represents a vertical section of an ash-can embodying my invention. Fig. 2 is aplan of the cast-metal body or frame on which the sheetmetal bottom is secured, and Fig. 3 is avertical section of a confectioners stove.

Similar letters of reference designate corresponding parts in all the figures.

A designates the cylindric body or casing. 13 designates the sheetmetal bottom fitted thereto, and O designates the cast-metal body or frame on which the bottom and casing are secured. The cast-metal body or frame is here shown as of skeleton form, and is composed of a cylindric portion, 0, provided at its base with an outwardly-extending rim or base-flange, c, and the top of which is composed of cross bars or ribs 0 thereby forming a light skeleton structure which is well adapted to the purpose. The bottom 13 is of circular form, and has at its periphery a downwardly-turned rim, b, made of a size to slip snugly over the circular portion 0 of the frame or body '0, and preferably of a depth to extend downward upon the base-rim c of the body 0. The sheet-metal casing A, which is of cylindric form, is slightly larger in diameter than the downwardlyeXtending rim or flange b of the bottom, and is slipped down over and around the same and to a bearing upon the base-rim c of the bottom body or frame. The parts which arethus combined are secured together permanently by rivets a, which are preferablyinserted through the circular portion 0 of the bottom body or frame 0, the rim b of the bottom, and the cylindric casing A, as is shown in Fig. 1.

In lieu of rivets the sheet-metal bottom may be secured on its body or frame, and the easing A may be soldered thereto; or the parts may be secured together by both rivets and solder. \Vhen the invention is applied to an ash-can, as shown in Figs. 1 and 2, the casing or body A may be provided with handles A.

Referring now to Fig. 3, which represents a stove such as is used by confectioners, D designates the fire-pot, and D the ash-pit, which are separated by a grate, G. This grate O is mounted and capable of tilting in a grate-ring, G which is secured to the body or casing A of the stove. lining, d, and from it extends a stove-pipe con- The fire-pot D has a fire-brick nection, d, through which the products of combustion escape. The top of the stove A is shown as consisting of concentric rings, which provides for forming a pot-hole of a size to suit any vessel which may be placed on the stove, and which also affords an opening through which fuel may be introduced. Access is had to the ash-pit through thedoor 6?.

When the invention is embodied in a confectioners stove, I prefer to form openings 6 around the circumference of the bottom, and which extend through the circular portion 0 of the bottom body, 0, and also through the flange b of the bottom 13, and through the cylindric casing A. These holes 6 provide for free ventilation below the bottom of the stove and serve to prevent the sheet-metal bottom and its supporting body or frame from becoming too highly heated.

By my invention I provide for connecting the bottom and easing of astove, ash-can, or other cylindric vessel in a very secure manner, and the rim 0 of the bottom body or frame, against which the casing and flange b and bottom abut, protects their lower edges and prevents the stove or vessel from being indented or injured when rolled about.

Ihave here shown the bottom B as flat, and of course the frame or body is correspondingly flat. Both the bottom and frame or body might, however, be concave or convex.

I am aware that it is not new to construct cylindric vessels with a downwardly-flanged I bottom, a cylindric casing fitting outside the same, and a ring upon which the downward ly-turned flange or rim ofthe bottom is slipped, and which has a shoulder against which the end of the casing abuts. Such a construction is shown in patent to T. M. Bell, No. 111,302, dated January 31, 1871, and is not included in my invention. In my improved vessel the skeleton base-frame 0 extends beneath the horizontal portion of the bottom B and serves to sustain and hold up the same, in addition to its function in preserving the circular form of the rim 1) and the casing A.

\Vhat I claim as my invention, and desire to secure by Letters Patent, is

1. Ina stove, can, or other cylindric vessel, the combination of the following parts: a sheetmetal bottom, B, having a downwardly-turned rim, b, a castn1etal skeleton base-frame, 0,

which extends beneath the horizontal portion of the bottom B, and which has a circular exterior on which the rim 1) is slipped, and an outwardly-projecting base-rim, c, at the lower end of the circular exterior, and the cylindric casing A, fitting outside the rim 1) of the bottom and abutting against the base-rim c, all substantially as herein described, whereby the skeleton base-frame 0 serves both to support the horizontal portion of the bottom B and to preserve the cylindric form of the rim b and easing A.

2. In a stove, the combination, with a sheetmetal bottom, B, having a downwardly-turned flange, b, of a cast-metal body or frame, 0,

over which the flange b is slipped, and which v is provided with a base-rim, c, and a casing, A, fitting outside the flange b and abutting against the rim 0, the stove being provided with holes or openings 6, which serve to ventilate the space below the raised bottom, substantially as herein described.

THOS. BURKHARD.

WVi tnesses FREDK. HAYNES, MATTHEW POLLOOK. 

